Aerating fuel-pump for explosive-motors.



J. SHAW. AERAT'ING FUEL PUMP FOR EXPLOSIVE MOTORS.

APPLICATION FILED H58. 16, 1914.

Patented Dec. 1, 1914.

IN V EN TOR.

WITNESSES A TTORNE Y JAMES SHAW, OF LODII, CALLEGRNIA AERATING FUEL-PUMP FOR EXPLOSIVE-MOTORS.

Specification of Letters Patent,

Patented Dec. 1, 1914.

Application filed. i'ebruary 16, 1914. Serial No. 818,856.

To all whom it may concern:

Be it known that I, JAMES SHAW, a citizen of the United States, residing at Lodi, in the county of San Joaquin and State of California, have invented certain new and useful Improvements upon Aerating Fuel-Pumps for Explosive-Motors; and I do declare the following to be a clear, full, and exact description of the same, reference being had to the accompanying drawings, and to the characters of reference marked thereon. which form a part of this application.

This invention relates to improvements in explosive motors generally and specifically for the fuel pump used in connection with motors commonly known as the high compression type and being those which operate without ignition sparks, the explosion being carried on after the engine is started by reason of the high compression entering the heated cylinders.

The aim of the invention is to provide a fuel pump by means of which, with the action of the engine, the fuel will be automatically aerated, compressed and delivered into the motor under high compression as is necessary to the successful operation of the enme. g A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly effective for the purposes for which it is designed.

These objects, I accomplish by means of such structure and relative arrangement of the parts as will fully appear by a perusal of the following specification and claims.

On the drawings, similar characters of reference indicate corresponding parts in the several views.

Figure 1 is a sectional view of a portion of the cylinder of an explosive motor showing the fuel inlet with my improved fuel pump connected therewith. The positions of the parts in this view are those assumed when a complete charge of fuel has been taken into the pump readv for deliverv to the motor. Fig. 2 is a sectional view of the pump proper showing the positions of the parts just after the aerated compressed charge of fuel has been deliverd to the .motor. Fig. 3 is a similar view showing the positions of the parts just at the moment of the intaking of the fuel into the pump and prior to its being aerated and compressed.

Referring now more particularly to the characters of reference on the drawings, the numeral 1 designates the cylinder of the motor and the numeral 2 the fuel intake pipe thereof.

My improved pump comprises a cylindrical member 3 which may be water jacketed or not as is desirable. Screwed onto the end of the cylindrical member 3, as at 4. is a tubular member 5 carrying a double acting ratchet lever 6 whereby the threaded position of the member 5 on the member 3 may be regulated. On the end of the member 5 is a projecting threaded stud -7 screw mounted on which is an adjustment can 8 provided with a double acting ratchet lever 9, wherebv the position of the member 8 on the member 7 may be determined. Movable in a reciprocating manner through the members 3. 5, 7 and 8 is a rod 10 having sn p nuts 11 screw mounted on its outer end with a buffer spring 12 interposed between such nuts 11 and the cap 8. Said rod 10 is provided with a cross head or plunger 13 within the member 5 and a spring 14 is interposed between the end of the member 5 and the member 13 whereby the member 11 will be held normally abutted against the end of the member 8, in which position the member 10 will form a norma closure for the inlet pipe 2.

The numeral 15 designates a compressor rod or plunger movable in the opposite end of the member 3 to that occupied by the member 10. said member 15 having a eonnecting rod 16 adapted to be connected in any suitable manner with the crank shaft or connecting rods of the motor. whereby with the motion of the piston in the motor, the compressor rod 15 will likewise be operated.

The numeral 17 designates a fuel intake pipe connecting with the member 3 just in advance of the limit of movement of the member 10, which pipe is provided with a check valve 18.

The numeral 19 designates a compressed air inlet pipe communicating with the mem her 3 immediately adjacent the pipe 17 and in such position as to open into the member 3 with the operation of the member 15 sub sequent to the pipe 17 being opened, all for a purpose as will appear. Said member 19 is provided with a check valve 20.

Describing now the operation of the pump, we will presume, for the sake of illustration, that the motor 1 has just received, through the fuel inlet pipe 2, a charge of compressed aerated fuel. In this position the piston of the motor would be at lts compression position in the cylinder, which action of the piston would likewise hold the member 15 at its innermost position within the member 3. This would cause the member 15 to engage the member 10 and move it backwardly against its position over the inlet pipe 2 and would move the cross head 13 to compress the spring 14, all as seen clearly in Fig. 2. The pipes 17 and 19 would then be closed by the member 15. Then with the explosion of the charge in the motor 1, the piston in such motor would be driven backwardly and carry the member 15 backwardly through the member 3. For a portion of this movement, the spring 14 would act against the cross head 13 to cause the member 10 to follow the member 15 in close relation. When the member 11 strikes the end of the member 8, this brings the rod 10 to a stop, which stopping point is just adjacent the inlet of the pipe 17 into the member 3. The movement of the member 15 then continues however opening the pipe 17 into communication with the member 3. At this time, there being no pressure in the member 3, the fuel passes by gravity or otherwise from the member 17 through the check valve 18 into the member 3. (The positions of the parts at this point are shown clearly in Fig. 3.) The movement of the member 15 however continues to open communication from the pipe 19 into the member 3 and compressed air then passes into the member 3 in such volume and under such compression as to close the check valve 18 and shut off further fuel supply. The compressed air however continues to flow into the member 3 for the full backward stroke of the member 15, thus thoroughly atomizing and aerating the fuel. Then when the piston in the motor starts forwardly on its compression stroke again, the member 15 is then likewise carried forward compressing the aerated fuel in the member 3 and overcoming the pressure of the air passing through the pipe 19 to close the check valve 20. This compression stroke of the member 15 then continues compressing the aerated fuel against the end of the member 10 until such compression overcomes the compression of the spring 14. Then the member 10 is gradually driven backward to open the inlet pipe 2, the aerated fuel then passing through said inlet pipe 2 into the motor. This action continues until the entire charge is forced into the motor and then the end of the member 15 comes into contact with the end of the member 10 again, as shown in Fig. 2, and then the action above described is repeated back and forth with the operation of the motor.

The tension of the spring 14 for the purpose of adjusting the parts to give the most efficient and well timed operation is accomplished by moving the ratchet lever 6 to adgance or retract the member 5 on the mem- The timing of delivery of the aerated charge of fuel into the motor is determined by the amount of movement allowed the member 10 which also controls the volume of fuel received from the pipe 17 and this movement of the rod 10 is controlled by operating the ratchet lever 9 to position the cap 8 on the member 7 to determine the point at which the member 11 will come to a stop against the head of the cap 8, the spring 12 preventing the same striking too suddenly.

From the foregoing description it will readily be seen that I have produced such a device as substantially fulfils the objects of the invention as set forth herein.

\Vhile this specification sets forth in detail the present and preferred construction of the device, still in practice, such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention.

Having thus described my invention what I claim as new and useful and desire to secure by Letters Patent is 1. A device of the character described comprising the combination with a motor having a fuel inlet, of a tubular member communicating with said fuel inlet, a pair of reciprocating membersmovable insaid tubular member and adapted to control said fuel inlet, a fuel and air inlet into said tubular member, one of said reciprocating members controlling the communication of said fuel and air inlet members into said tubular member, as described.

2. A device of the character described comprising the combination with a motor having a fuel inlet, of a tubular member communicating with said inlet, a fuel and .air inlet communicating with said tubular member, a pair of reciprocating members in said tubular member, one of said reciprocating members controlling the communication from said tubular member into said fuel inlet to said motor, the other of said reciprocating members controlling communication from said fuel and air inlets into said tubular member, as described.

3. A device of the character described comprising a tubular member having two inlets and an outlet, a pair of reciprocating members movable in said tubular member, one of said reciprocating members controlling the outlet from said tubular member, a spring actuating said last named reciprocating member, the other of said reciprocating members controlling said inlets and means for operating said last named reciprocating member, as described.

4. A device of the character described comprising a tubular member havingan outlet and a pair of inlets a pair of reciprocating members, movable in said tubular member, one of said reciprocating members controlling said outlet and the other controlling said pair of inlets, said last named reciprocating member adapted to move to 0 en one of said inlets when said outlet is cibsed and to open the other of said inlets after the first one is opened, as described.

5. A device of the character described comprising a tubular member having an outlet and a pair of inlets a pair of reciprocating members movable in said tubular member one of said reciprocating members controlling said outlet and the other controlling said pair of inlets, said last named reciprocating member adapted to move to open one of said inlets when said outlet is closed and to open the other of said inlets after the first one is o ned, and a check valve in each of said inl ts, as described.

6. A device of the character described comprising a tubular member having an outlet and two inlets, a reciprocating member movable in said tubular member and controlling said outlet, a spring actuating said reciprocating member, means for limiting the movement of said reciprocating member, another reciprocating member controlling said inlets, means for operating said last named reciprocating member to cause it to impinge against sai first named reci rocating member to move said first name reci rocating member to open said outlet, as escribed.

In testimony whereof I aflix my signature in presence of two witnesses.

JAMES SHAW. Witnesses:

STEPHEN U. Bnawm, Vnaanmn WARNER. 

